Nut-lock.



' IIIIIIIIIIIIIIIIIIII 18,1911. 1,006,918. Y Patented 001124,1911.

' a citizen ofthe United` States,

' STATES r y rca,

NUT-Loox.

l specification of Letters Patent.

Patented ct. 24, 1911.

@puatron med May 1a, 1911. seria1 No. 627,912. y

4To all whom. 4it lmay concern:

Be it known that I, HENRY S. DELAMERE, residing at South Berkeley, in the county of-Alameda, State of'California, have invented certain new and useful Improvements in Nut- Locksg. and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. l

rIhis invention relates to nut locks;

The object of the inventionresides i`n the provision of a simple and inexpensive device of the character. named, which can be readily and easily applied and which in use effectually holds a nut from turning off its bolt.1f The last mentioned term is employed in its generic sense to include equivalent devices, such as rods havingt-hreaded ends ca able of receiving nuts. The nutsmay be'o any form, but in the embodiment of the invention herein illustrated and described` it is shown as being of the'square kind.

With these and other objects in 4viewuthe invention consists in the details of construc' tion and in the arrangement and combinathe appended claim.

tion of parts to be hereinafter more fully describedand particularly. pointed out in In describing the invention in detail, reference will be had to the accompanying drawingstwherein like characters of refer-- ence denote corresponding parts in the several views, and inv which- I Figure 1 is lan elevation partly .inA section of a bolt and nut embodying the invention. Fig. 2, a view similar to Fig. V1 with the locking device carried by the'nut shown inactive. Fig. 3, a section on the line 3--3 of Figf 1. Fig. 4 a section on the line H4--4 of Fig. 2, and Fig. 5, a plan view of the bolt member looking at the grooved side thereof.

Referring to thel drawings A indicates the bolt member of the nut lock which has its shank threaded as at 1'0.- Extending longitudinally ofthe shank ofthe bolt and.inter rupting the threads .10 is a groove 11 for a purpose that .will presently appear. The

nut member of the lock is indicated at 12 and is provided with a threaded opening 13 with threads 16 which normally form a con- .tinuation of thev threads of the 'opening 13 whereby said insert 15 offers no impediment to the screwing of the'nut 12 upon the shank of the bolt A to a desired position.

In order'to lock the nutwhen same has been screwed down to the desired position with thel groove 14 in registrationwith the groove 11 andthe insert 15 in the position shown in Fig. 1, it is only necessary to compress the insert '15 longitudinally so as to give a portion ofits -threads an increased pitch and in addition cause said portion of the insert to lowinto the groove 11. This results in the threads of the insert being carriedout of registration with the threads of the nut and bolt, so that instead of not interfering in the rotation of the nut on the bolt theyinterfere. It will. be noted however, that when the' nut has beenv locked on the bolt that the former is capable of being i unscrewed bythe application' of sufficient Aforce as the threads of the bolt will cut their own way"through the soft metal' insert 15.

While the'shank-of the bolt A has been shown, as having a single longitudinal lgroove it will be rnoted that a number of these grooves may be employed if desired and likewise instead of having a single soft metal insert carriedby-the nut, a plurality of same may be included in the structure.

-What'is claimed: is: y

, The combination with a threaded bolt having a'l gitudinal groove intersecting .its threads, of a nut having a longitudinal groove intersecting its threads and a metal insert filling the groove of the nut and provided with threads having the same pitch and registering with the threadsoi: the nut,

the insert being of ductle metal whchuuder In testimonyt whereof', ,I ofx my signathe ncfliuence ofd-end pressure will ie com ture, in presence Cimino-Witnesses.

resse lonwtu nall so as to re uce its hngt-h suicently to lyncrease the pitch of u HENRY'S' DELAMERE 5 portion of its threads and thereby curry Witnesses: them out of registration with corresponding A. K. FARNWORTH, threads of the nut'. i H. Gr. (SrUrlrurlG.l

Copies of this patent may be obtained for v; cents each, by addressing the Commissioner of Patents,

- Washington, D. C. 

